Duct Cleaning Methods
Power Whip/Viper Method. This method is suitable for many cleaning tasks. A power whip cleaning tool is combined with forced air and vacuum to evacuate dirt, dust and debris from the ducts. All institutional, commercial and industrial cleaning involves either the Pneumatic Brush or Power Whip method (described below).
Pneumatic Brush Method. This is our most advanced of the three cleaning methods, ensuring superior results. In the pneumatic brush method, hi-tech rotating brushes combined with a powerful vacuum are used to clean the ducts. This technology is commonly used in hospital and institutional cleaning, where the highest standards of cleanliness are mandatory. White-glove testing of the ducting should detect no dust residue once this method of cleaning has been used.
Disinfecting and Deodorizing Ducts
After cleaning, Don’s Power Vac disinfects the ducts with a mild antibacterial and anti-fungal compound. This compound is widely used for cleaning in hospitals and has no harsh chemical side effects.
Unlike many of our competitors, Don’s disinfecting procedure does not use fogging to spread the disinfectant. Instead, disinfectant is applied onto brushes that rotate through 360 degrees of direct contact with the ductwork. This hi-tech process gives a more even layer of disinfectant resulting in a higher standard of disinfection.
After disinfection, duct cleaning is completed with a fresh, mild lemon-scented deodorant that leaves the ducting smelling fresh and clean. If no residual smell is wanted or required, the ducting can be disinfected without deodorizing to provide odorless and clean air.
For ongoing air disinfection, an Ultraviolet (UVC) light (link to Products page) can be installed in the return air duct. Studies have concluded that UVC is highly effective in killing or stopping bacteria growth and other micro-organisms.
Measuring Duct Cleanliness
There are several accepted ways to measure duct cleaning effectiveness. The most common duct cleanliness standard is established visually – no visible dust can be present after cleaning.
A greater standard of cleanliness is the white-glove test. For a air duct to pass this white-glove test, there must be no visible dust or residue on a cloth used to wipe the duct surface after it has been cleaned.
The highest measure of duct cleaning requires the freshly cleaned duct walls to be tested to find out how many micro-organisms remain on the area. The test result is expressed as the number of colony forming units (CFU) detected. Hospitals and other high-cleanliness environments typically specify the maximum number of CFUs that may be present after cleaning and disinfection. It is common for Don’s Power Vac to greatly surpass the CFU standard specifications on institutional cleaning projects.